Bottom case for the DROK 200407 12V to 5V DC USB Buck Converter Dual USB Port Fast Charger Board with an integrated Synta/Vixen-style finder dovetail for mounting on a telescope. Reuse the hardware and top case that came with the product.
Print is a tight fit when printed with my Ender-3 S1. Some may need to make the outer walls 1.2mm instead of 1.4mm thick. CAD project is here: https://cad.onshape.com/documents/c0ecda75fbae5b691d4c9724/w/1bb0bb2199eddcecb699d535/e/04824a9fccbfbc1e6eb4e8e4
The author marked this model as their own original creation.